Concurrent Alcohol and Marijuana Use Patterns Among High School Seniors in the United States

Michelle Loher, Joy Bohyun Jang, Boris B. Quednow, Lilly Shanahan, Megan E. Patrick, Jacobs Center for Productive Youth Development, University of Zurich, Institute for Social Research, University of Michigan, Ann Arbor, Experimental Pharmacopsychology and Psychological Addiction Research, Department of Adult Psychiatry and Psychotherapy, University Hospital of Psychiatry Zurich, University of Zurich, Department of Psychology, University of Zurich

Journal of Drug Issues

Published online on November 19, 2025

Abstract

Journal of Drug Issues, Ahead of Print.
Concurrent alcohol and marijuana use is common. Knowledge about whether adolescents differ in use frequency across single vs. concurrent use is limited. This study examined past 30-day use patterns by frequency (frequent [20+ occasions] vs. occasional [<...